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Composite pencil lead and preparation method thereof

A composite material and pen core technology, applied in the field of pen core manufacturing, can solve problems such as fast consumption, blurred diffusion, and small binding force, and achieve the effects of long storage time, good stability, and high lubricity

Pending Publication Date: 2019-12-03
上海佳利笔业文具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a pencil, the carbon atoms in graphite are arranged in layers, the bonding force between layers is small, it is easy to disperse, it acts on the surface of paper or other objects, has poor wear resistance, and consumes quickly
And over time, it is easy to leave spots of ink marks
And due to the limited hardness of graphite, it is easy to break the refill
[0003] For some special fields, such as the space station and the outer space where the manned spacecraft is located, the fountain pen can no longer be used, and the pencil mark is too shallow and easy to spread and blur
In addition, on the surface of some special materials, such as ceramics, metal plates, etc., it is not easy to use existing pens or pencils to color

Method used

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  • Composite pencil lead and preparation method thereof
  • Composite pencil lead and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A composite material pen core, its raw materials include 76 parts of graphite powder, 17 parts of bisphenol A type unsaturated polyester resin, 3 parts of asphalt, 0.1 part of bismuth powder and 0.9 part of indium powder in parts by mass.

[0032] The present invention also provides a preparation method for the above-mentioned composite material pen core, comprising the following steps:

[0033] Step 1: First mix the raw materials evenly according to the proportion, preheat for 3 hours under vacuum conditions, the preheating temperature is 150°C, and then calcine under the protection of carbon at 310°C;

[0034] Step 2: The calcined material is injection molded, and then annealed at 115° C. for 2.5 hours to obtain a rough composite material pen core.

Embodiment 2

[0036] A composite material pen core, its raw materials include 67 parts of graphite powder, 14 parts of bisphenol A type unsaturated polyester resin, 8 parts of pitch, 3 parts of bismuth powder, 0.5 part of indium powder, 0.1 part of gallium powder, 0.1 part of Copper oxide powder.

[0037] The raw materials include 80 parts of graphite powder, 12 parts of bisphenol A unsaturated polyester resin, 6 parts of pitch, 1.2 parts of bismuth powder, 0.8 parts of indium powder, 0.9 parts of gallium powder, 0.3 parts of copper oxide powder, 0.3 parts of Methoxy polyethylene glycol, 0.2 parts of carbon black.

[0038] The present invention also provides a preparation method for the above-mentioned composite material pen core, comprising the following steps:

[0039] Step 1: First mix the raw materials evenly according to the proportion, preheat for 6 hours under vacuum conditions, the preheating temperature is 200°C, and then calcine under the protection of carbon at 340°C;

[0040] ...

Embodiment 3

[0042] A composite material pen core, its raw materials include 90 parts of graphite powder, 12 parts of bisphenol A type unsaturated polyester resin, 5 parts of pitch, 0.7 part of bismuth powder, 1 part of indium powder, 0.5 part of methoxy poly ethylene glycol.

[0043] The present invention also provides a preparation method for the above-mentioned composite material pen core, comprising the following steps:

[0044] Step 1: First mix the raw materials evenly according to the proportion, preheat for 3 hours under vacuum conditions, the preheating temperature is 280°C, and then calcine under the protection of carbon at 330°C;

[0045] Step 2: The calcined material is injection molded, and then annealed at 110° C. for 3 hours to obtain a rough composite material pen core.

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Abstract

The invention provides a composite pencil lead. The composite pencil lead is prepared from the raw materials in parts by mass: graphite powder, bisphenol A-type unsaturated polyester resin, asphalt, bismuth powder and indium powder. A preparation method of the composite pencil lead comprises the following steps that the raw materials are mixed evenly according to the ratio firstly, a mixture is preheated under the vacuum condition at the preheating temperature of 150-280 DEG C, and then the preheated mixture is calcined under carbon protection at 310-340 DEG C; and then a calcined material issubjected to injection-compression molding, annealing is conducted, and thus a composite pencil lead coarse material is obtained. The composite pencil lead is prepared from an environment-friendly material, has no pollution to the environment, has no harm to a human body and is high in abrasion resistance, and the abrasion resistance of the composite pencil lead is much higher than that of a pencil and higher than that of a metal refill; brightness and the gray level are high; the pencil lead is high in flowability and lubricating degree, not prone to being oxidized, resistant to corrosion andgood in stability; the composite pencil lead can be used as a pencil lead, the pencil point is firm, and no powder falls off in the writing process; writing is smooth, and handwriting is long in preservation time and not prone to deforming; the hardness can reach the HB level; and the composite pencil lead can be applied universally, and erasing is easy.

Description

technical field [0001] The invention belongs to the technical field of pen core manufacturing, and in particular relates to a composite material pen core and a preparation method thereof. Background technique [0002] Existing pens, including fountain pens and pencils, are generally applicable in life. In a pencil, the carbon atoms in graphite are arranged in layers, the binding force between layers is small, it is easy to scatter, and it acts on the surface of paper or other objects, which has poor wear resistance and fast consumption. And over time, it is easy to leave spots of ink marks. And due to the limited hardness of graphite, the problem of broken refill is prone to occur. [0003] For some special fields, such as the space station and the outer space where the manned spacecraft is located, the fountain pen can no longer be used, and the pencil marks are too shallow and easy to spread and blur. In addition, on the surface of some special materials, such as cerami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
CPCC09D13/00
Inventor 谭荣辉
Owner 上海佳利笔业文具有限公司
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